Answer:
Step-by-step explanation:
The difference of squares formula gives us
(you can multiply this out to confirm)
and
Thus, by the difference of squares formula
(s o t)(-7) = s(t(-7)) = s(3(-7)) = s(-21) = 2 - (-21)^2 = 2 - 441 = -439
Answer:
b
Step-by-step explanation:
Answer:
0.674
Step-by-step explanation: